The axial tilt of mercury is around 2.11 degrees, not very much. So yes, the axis of rotation is almost exactly perpendicular to the elliptical plane.
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Mercury
The tilt of Mercury is very small, about 0.034 degrees, making it almost upright compared to its orbit around the Sun. This means that Mercury's axis is nearly perpendicular to its orbital plane, resulting in minimal seasons on the planet.
Answer this question… Uranus's axis of rotation is tilted at about 98 degrees from the perpendicular to its orbital plane. This means its axis is roughly in the plane of.
23.5°
An axis is an imaginary line perpendicular to the plane of rotation and centered on the center of mass of the (solar) system.